What's nearly as bad---and it happened to day, is someone who has no idea of space and time. You come rippin down the ramp, and a 1/4 second glance should tell anyone who's awake, "he's gonna clear me fine," but no, they have to be a moron and get into the left lane. Meanwhile, "you" go screechin' out ahead of 'em with hundreds of feet to spare.
Most memorable ramp was getting onto the Bay Bridge from Treasure Island back in 68/9. They used to station a Marine down at the ramp, who'd look back for clear spots and wave you on. They expected you to get with the program.